I am looking at the Chinese lasers available on ebay. I am looking to get recommendations from others who have bought them and your experience with them. The wife and I have a side business that does decals, shirts, and signs and just want to be able to expand our capabilities. I am a Applications Engineer (Former Machinist) so I am not afraid of something that needs a bit of tinkering to get it running great. One of the main things we want to do is glass so we will be getting a rotary and I am hinting I want one in the 80w range. Any help is greatly appreciated.